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Locking of entanglement

Friday 10th September 2004 - 11:30 to 12:15
INI Seminar Room 2

We study the loss of entanglement of bipartite state subjected to discarding or measurement of one qubit. Examining the behavior of different entanglement measures, we find that entanglement of formation, entanglement cost, and negativity are lockable measures in that they can decrease arbitrarily after measuring one qubit. Relative entropy of entanglement is shown to be a non-lockable measure.

University of Cambridge Research Councils UK
    Clay Mathematics Institute London Mathematical Society NM Rothschild and Sons